MINE DETAILS
Cortez District-Underground
MSHA MINE ID2602573
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Cortez District-Underground40.20056, -116.61917Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
1,131,296reported employee hours
Tons per hour
0.00production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
Quarterly data and reporting coverage
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | 187,484 | 0.00 | 351 | 1/1 mines reporting |
| 2025 Q2 | 0 | 193,264 | 0.00 | 360 | 1/1 mines reporting |
| 2025 Q3 | 0 | 191,497 | 0.00 | 362 | 1/1 mines reporting |
| 2025 Q4 | 0 | 209,897 | 0.00 | 339 | 1/1 mines reporting |
| 2026 Q1 | 0 | 178,202 | 0.00 | 339 | 1/1 mines reporting |
| 2026 Q2 | 0 | 170,952 | 0.00 | 372 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
1085 significant & substantial (S&S)
Accident records
60 records classified as fatality
Proposed penalties · USD
48,115.00106 of 108 violations with amounts
On-site inspection hours
591.0023 inspections · 23 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 21 | 2 | 9,594.00 | 0 | 0 | 4 | 88.8 |
| 2025-Q2 | 27 | 2 | 10,742.00 | 1 | 0 | 5 | 92.0 |
| 2025-Q3 | 15 | 0 | 3,061.00 | 1 | 0 | 1 | 63.5 |
| 2025-Q4 | 11 | 0 | 3,776.00 | 0 | 0 | 3 | 58.8 |
| 2026-Q1 | 11 | 0 | 6,255.00 | 2 | 0 | 1 | 60.0 |
| 2026-Q2 | 19 | 0 | 12,743.00 | 2 | 0 | 4 | 157.5 |
| 2026-Q3 | 3 | 1 | 1,944.00 | 0 | 0 | 3 | 60.5 |
| 2026-Q4 * | 1 | 0 | — | 0 | 0 | 2 | 10.0 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Regular Safety and Health Inspection · 0.0 on-site hours
Non-Injury Accident Investigation · 10.0 on-site hours
Description not reported
57.3360 · $697.00 proposed
Regular Safety and Health Inspection · 46.5 on-site hours
57.15001 · $288.00 proposed
Compliance Follow-up Inspection · 11.0 on-site hours
57.5001(a)/57.5005 · S&S · $959.00 proposed
Compliance Follow-up Inspection · 3.0 on-site hours
57.9313 · $193.00 proposed
57.3360 · $432.00 proposed
57.15001 · $288.00 proposed
Regular Safety and Health Inspection · 56.5 on-site hours
47.42(b) · $336.00 proposed
57.4102 · $818.00 proposed
57.4102 · $818.00 proposed
57.4102 · $818.00 proposed
57.3360 · $1,818.00 proposed
Description not reported · $151.00 proposed
57.8520 · $336.00 proposed
57.8529 · $336.00 proposed
FIRE · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Ee was driving Ford F250 underground, heard a loud bang, slowed to stop, saw flames coming from clothes, jumped out of truck, rolled on ground. Truck rolled, ee grabbed fire extinguisher, called mayday, tried to put fire out. Shifter arrived, took ee to surface. Seen at ER, diagnosed with 2nd degree burns to left hand, referred to burn unit.
Non-Fatal Accident Investigation · 20.5 on-site hours
Description not reported
57.8531(c) · $336.00 proposed
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
OWNERSHIP
Operator and controller history
Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.
—
Barrick Nevada Holding LLC et alcontrolsNevada Gold Mines LLCoperatesCortez District-Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602573—
Newmont USA Limited et alcontrolsNevada Gold Mines LLCoperatesCortez District-Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602573—
Barrick Gold CorpcontrolsBarrick Cortez Inc.operatesCortez District-Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602573—
Keith JonescontrolsSmall Mine Development LLCoperatesCortez District-Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602573—
Barrick Gold CorpcontrolsCORTEZ JOINT VENTUREoperatesCortez District-Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602573—
Ronald W GuillcontrolsSmall Mine Development LLCoperatesCortez District-Underground
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602573Other historical summaries · source-specific periods
RECORD SUMMARY
Production, safety and enforcement
These summaries use the periods stated on each card, independently of the reporting period above.
01 / SAFETYwatch
Accidents and injuries
89 historical accident/injury rows; 1 coded fatalities and 1,906 lost days across the published record.
ACCIDENT + INJURY RECORD20 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
780 violation rows across the full record; 108 carry an S&S flag and $668,980 appears in current assessed amounts.
ENFORCEMENT ACTIVITY358 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
205 personal; 5 area. 10 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
OCCUPATIONAL EXPOSURE210 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
171K employee hours and 372 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
68 contested-violation rows, 68 civil-penalty docket/decision rows, and 81 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE217 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions06 / CONTRACTORScontext
Contractors
Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
ENTITY-LEVEL CONTEXT37 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
174 inspection events and 9K published inspection hours across the historical record.
OVERSIGHT COVERAGE63 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 32 silica records across the mine’s published history.
Personal silica samples · concentration / limit
Quarterly mean · published C/E ratio
— No eligible measurements. * Quarter in progress. Means describe the available samples, not average exposure across the mine.
Quartz % is the sample’s quartz content; µg/m³ is its reported concentration. Personal C/E is the ratio to the limit published with that sample. Personal and area concentration units and void status are not specified in those source files.
| Date / sample | Dataset / analyte | Occupation / area | Measurement | Sample status | Published action |
|---|---|---|---|---|---|
| 000000202603668300 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Roof Bolter, Rock | 0.34× published limitConcentration: 0000.36 · limit: 0001.05Source unit unspecified | Not reported | NO ACTIONInspection F0344FF |
| 000000202603668400 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Drill Operator, Jumbo Perc. | 0.39× published limitConcentration: 0000.43 · limit: 0001.09Source unit unspecified | Not reported | NO ACTIONInspection F0344FF |
| 000000202603668200 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Truck Driver | 0.16× published limitConcentration: 0000.19 · limit: 0001.19Source unit unspecified | Not reported | NO ACTIONInspection F0344FF |
| 000000202603218600 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Roof Bolter, Rock | 0.21× published limitConcentration: 0000.29 · limit: 0001.35Source unit unspecified | Not reported | NO ACTIONInspection F011AE6 |
| 000000202602481400 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Drill Operator, Rotary | 0.79× published limitConcentration: 0000.86 · limit: 0001.09Source unit unspecified | Not reported | NO ACTIONInspection F011ADB |
| 000000202602481500 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Roof Bolter, Rock | 1.42× published limitConcentration: 0001.42 · limit: 0001.00Source unit unspecified | Not reported | CITATION/ORDER ISSUEDInspection F011ADB |
Sources and interpretation
- Coal means use numeric concentrations from samples marked not voided, excluding control/invalid sample types and dates after the snapshot. Missing values remain null; reported zeroes remain zero.
- Quarterly means describe available samples, not mine-wide or worker-average exposure. Quarters with no eligible measurements remain empty; the current quarter is partial.
- Personal C/E is MSHA's published concentration-to-limit ratio. A value above 1 is not by itself a citation or a determination under the 2024 silica rule. Personal and area files do not publish a void-status field.
- Area records include bulk-dust analyses and are kept separate from personal exposure results. Their concentration units are not specified in the source dictionary.
- Missing samples do not establish safe conditions. Coal quartz percentage and concentration are separate measures. No compliance threshold is inferred for coal samples.
Coal quartz field definitions ↗Metal/nonmetal personal field definitions ↗Metal/nonmetal area field definitions ↗
EIA + TITLE 30
EIA production and cited regulations
EIA annual figures are reported separately from MSHA. Regulation links use the current eCFR snapshot.
Not present in the 2024 EIA coal workbook.
This can mean the operation is non-coal, inactive for the annual period, or outside the EIA-7A reporting population.
30 CFR 57.3360Ground support use.3 recent rows ↗30 CFR 57.15001First aid materials.2 recent rows ↗30 CFR 57.5001Exposure limits for airborne contaminants.1 recent row ↗30 CFR 57.9313Roadway maintenance.1 recent row ↗30 CFR 47.42Label contents.1 recent row ↗30 CFR 57.4102Spillage and leakage.3 recent rows ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
5109594—Order
510471657.3360Citation
510471557.15001Citation
510949757.5001(a)/57.5005S&S
510949657.9313Citation
510498057.3360Citation
510469457.15001Citation
510497947.42(b)Citation
Coal dust, noise and other contaminants. Silica records above ↑
ORGANIC CARBONMucking Mach. Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Mucking Mach. Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Mucking Mach. Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Mucking Mach. Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors89Feb 23, 2006—May 23, 2026mine-keyed
Addresses of Recordidentity · logistics1Dec 9, 2008—Dec 9, 2008mine-keyed
Assessed Violationscompliance · legal759Feb 8, 2006—Sep 1, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal68Jun 23, 2010—Oct 10, 2024mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal81Mar 21, 2006—Aug 4, 2026mine-keyed
Contested Violationscompliance · legal68May 18, 2009—Apr 10, 2024mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety7,542Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety1,577Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance6Nov 8, 2005—Jul 1, 2019mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance199Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance48Not published—Not publishedmine-keyed
Inspectionssafety · compliance174Feb 7, 2006—Oct 5, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety5Aug 7, 2009—Sep 3, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety205Aug 22, 2006—Sep 3, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal780Feb 8, 2006—Oct 2, 2026mine-keyed
107(a) Orders Issuedsafety · compliance—No published rowsabsent / not applicable
NOTES
Limitations
- Contractor production is entity-level and is never represented as mine-attributable.
- Missing rows can mean no event, publication delay, identity mismatch, or inapplicability.